Traité de l'Harmonie Universelle (Paris 1627) -- a work on music, acoustics and instruments which he continued to improve throughout his life.Esquisse manuscrite d'un Traité de Son -- an outline of Traité du Son.

Petri Gassendi theology epistolica exercitatio (Paris 1630).

Questions inouyes (Paris 1634).

Questions Harmoniques (Paris 1634) -- includes many remarkable findings in Physics, Ethics and other Sciences.